You are not dense, Kathy. You upload your layout or layouts into your gallery, allow public embedding, then post the image code in this thread.
For linking products, when you hit reply (don't use the quick reply at the bottom, actually click reply on the last post), there will be a button to click at the bottom to link products from the site store.
Hope that helps...

p.s. BTW - For what it's worth, I have one as well, and sadly have only used it maybe once or twice, so I hear ya! Here's to hoping that you do end up using it, maybe fall back in love with it and don't end up ultimately seperated!